THERMAL SCIENCE

International Scientific Journal

Ali J. Chamkha

,

Zeinab Abdelrahman

,

Mohamed Mansour

,

Taher Armaghani

,

Ahmed Rashad

EFFECTS OF MAGNETIC FIELD INCLINATION AND INTERNAL HEAT SOURCES ON NANOFLUID HEAT TRANSFER AND ENTROPY GENERATION IN A DOUBLE LID DRIVEN L-SHAPED CAVITY

ABSTRACT
Mixed convection has been one of the most interesting subjects of study in the area of heat transfer for many years. The entropy generation due to MHD mixed convection heat transfer in L-shaped enclosure being filled with Cu-water nanofluid and having an internal heating generation is explored in this investigation by the finite volume technique. Lid-motion is presented by both right and top parts of walls to induce forced convection and the cavity is under an inclined uniform magnetic field along the positive horizontal direction. The statistics concentrated specifically on the impacts of several key parameters like as the aspect ratio of the enclosure, Hartmann number, nanoparticle volume fraction, and heat source length/location on the heat transfer inside the L-shaped enclosure. Outcomes have been manifested in terms of isotherm lines, streamlines, local and average Nusselt numbers. The obtained results show that addition of nanoparticles into pure fluid leads to increase of heat transfer. The maximum value of local Nusselt pertaining to the heat source occurs when L = 0.1. Impacts of heat source size and location, internal heat generation absorption, angle of magnetic field on heat transfer and entropy generation are completely analyzed and discussed. The best configuration and values of important parameters are also presented using thermal performance criteria.
KEYWORDS
lid driven L-shaped enclosure, heat generation/absorption, entropy generation, nanofluid, heat source size/location, magnetic field
PAPER SUBMITTED: 2019-02-17
PAPER REVISED: 2019-07-21
PAPER ACCEPTED: 2019-08-15
PUBLISHED ONLINE: 2019-09-15
DOI REFERENCE: https://doi.org/10.2298/TSCI190217325C
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2021, VOLUME 25, ISSUE Issue 2, PAGES [1033 - 1046]
REFERENCES
  1. Izadi, S., et al., A Comprehensive Review on Mixed Convection of Nanofluids in Various Shapes of Enclosures, Powder Technology, 343 (2019), 2, pp. 880-907
  2. Mahmoodi, M., Numerical Simulation of Free Convection of a Nanofluid in L-Shaped Cavities, International Journal of Thermal Sciences, 50 (2011), 9, pp. 1731-1740
  3. Sourtiji, E., Hosseinizadeh, S. F., Heat Transfer Augmentation of Magnetohydrodynamics Natural-Convection in L-Shaped Cavities Utilizing Nanofluid, Thermal Science, 16 (2012), 2, pp. 489-501
  4. Abbasian Arani, A. A., et al., Study of Nanofluid Natural-Convection in an Inclined L-Shaped Cavity, Scientia Iranica, 20 (2013), 6, pp. 2297-2305
  5. Mliki, B., et al, Lattice-Boltzmann Simulation of Natural-Convection in an L-Shaped Enclosure in the Presence of Nanofluid, Inter. J. Engineering Science and Technology, 18 (2015), 3, pp. 503-511
  6. Che Sidik, N. A., et al., Numerical Investigation of Natural-Convection of Nanofluids in L-Shaped Enclosures, Advanced Materials Research, 849 (2013), Nov., pp. 391-396
  7. Che Sidik, N. A., et al., Modelling of Convective Heat Transfer of Nanofluid in Inversed L-Shaped Cavities, Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, 21 (2016), 1, pp. 1-12
  8. Alavi, N., et al., Natural-Convection Heat Transfer of a Nanofluid in a Baffle L-Salped Cavity, Journal of Solid and Fluid Mechanics, 6 (2016), 4, pp. 311-321
  9. Armaghani, T., et al., Numerical Investigation of Water-Alumina Nanofluid Natural-Convection Heat Transfer and Entropy Generation in a Baffled L-Shaped Cavity, Journal of Molecular Liquids, 223 (2016), 11, pp. 243-251
  10. Armaghani, T., et al., Mixed Convection and Entropy Generation of an Ag-Water Nanofluid in an Inclined L-Shaped Channel, Energies, 12 (2019), 6, pp. 1150-1160
  11. Armaghani, T., et al., Effects of Discrete Heat Source Location on Heat Transfer and Entropy Generation Nanofluid in an Open Inclined L-Shaped Cavity, International Journal of Numerical Methods for Heat and Fluid-Flow, 29 (2019), 4, pp. 1363-1377
  12. Mohebbi, R., et al., Numerical Simulation of Natural-Convection Heat Transfer of a Nanofluid in an L-Shaped Enclosure with a Heating Obstacle, Journal of the Taiwan Institute of Chemical Engineers, 72 (2017), 3, pp. 70-84
  13. Rahimi, A., et al., Natural-Convection Analysis Employing Entropy Generation and Heatline Visualization in a Hollow L-Shaped Cavity Filled with Nanofluid Using Lattice Boltzmann Method- Experimental Thermo-Physical Properties, Physica E: Low-Dimensional Systems and Nanostructures, 97 (2018), 3, pp. 82-97
  14. Rashad, A. M., et al., The MHD Mixed Convection and Entropy Generation of Nanofluid in a Lid-Driven U-Shaped Cavity with Internal Heat and Partial Slip, Physics of Fluids, 31 (2019), 4, 042006
  15. Mohamad, A. T., et al., Nanoparticles: A Review on Their Synthesis, Characterization and Physicochemical Properties for Energy Technology Industry, Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, 46 (2018), 1, pp. 1-10
  16. Khanafer, K. M, et al., Mixed Convection Flow in a Lid-Driven Enclosure Filled with a Fluid-Saturated Porous Medium, International Journal of Heat and Mass Transfer, 42 (1999), 13, pp. 2465-2481
  17. Iwatsu, R., et al., Mixed Convection in a Driven Cavity with a Stable Vertical Temperature Gradient, International Journal of Heat and Mass Transfer, 36 (1993), 6, pp. 1601-1608
  18. Aminossadati, S. M., et al., Natural-Convection Cooling of a Localized Heat Source at the Bottom of a Nanofluid-Filled Enclosure, Eur. J. Mech. B/Fluids, 28 (2009), 5, pp. 630-40
  19. Khanafer, K. M., et al., Buoyancy-Driven Heat Transfer Enhancement in a 2-D Enclosure Utilizing Nanofluids, International Journal of Heat and Mass Transfer, 46 (2003), 19, pp. 3639-3653
  20. Abu-Nada, E., et al., Effect of Nanofluid Variable Properties on Natural-Convection in Enclosures Filled with a Cuo-EG-Water Nanofluid, International Journal of Thermal Sciences, 49 (2010),12, pp. 2339-2352
  21. Maxwell, J. A., Treatise on Electricity and Magnetism, 2nd ed., Oxford University, Press, Cambridge, UK, 1904
  22. Brinkman, H. C., The Viscosity of Concentrated Suspensions and Solution, Jornal of Chemical Physics, 20 (1952), 4, pp. 571-581
  23. Chamkha, A. J., et al., Effects of Heat Sink and Source and Entropy Generation on MHD Mixed Convection of a Cu-Water Nanofluid in a Lid-Driven Square Porous Enclosure with Partial Slip, Physics of Fluids, 29 (2017), 5, 052001
  24. Chamkha, A. J., et al., Effects of Partial Slip on Entropy Generation and MHD Combined Convection in a Lid-Driven Porous Enclosure Saturated with a Cu-Water Nanofluid, Journal of Thermal Analysis and Calorimetry, 132 (2018), 2, pp. 1291-1306
  25. Rashad, A. M., et al., Entropy Generation and MHD Natural-Convection of a Nanofluid in an Inclined Square Porous Cavity: Effects of a Heat Sink and Source Size and Location, Chinese Journal of Physics, 56 (2018), 1, pp. 193-211
  26. Ismael, M. A., et al., Conjugate Heat Transfer and Entropy Generation in a Cavity Filled with a Nanofluid-Saturated Porous Media and Heated by a Triangular Solid, Journal of the Taiwan Institute of Chemical Engineering, 59 (2016), 2, pp. 138-151
  27. Patankar, S. V., Numerical Heat Transfer and Fluid-Flow, Hemisphere, New York, USA, 1980
PDF VERSION [DOWNLOAD]
Effects of magnetic field inclination and internal heat sources on nanofluid heat transfer and entropy generation in a double lid driven L-shaped cavity

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence